/*
 * This file is part of aion-engine <aion-engine.com>
 *
 * aion-engine is private software: you can redistribute it and or modify
 * it under the terms of the GNU Lesser Public License as published by
 * the Private Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * aion-engine is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser Public License for more details.
 *
 * You should have received a copy of the GNU Lesser Public License
 * along with aion-engine.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.aionengine.gameserver.utils.xml;

import java.io.ByteArrayOutputStream;
import java.util.zip.Deflater;
import java.util.zip.Inflater;

/**
 * @author Rolandas
 */
public final class CompressUtil {

    public static String Decompress(byte[] bytes) throws Exception {
        Inflater decompressor = new Inflater();
        decompressor.setInput(bytes);

        // Create an expandable byte array to hold the decompressed data
        ByteArrayOutputStream bos = new ByteArrayOutputStream(bytes.length);

        byte[] buffer = new byte[1024];
        try {
            while (true) {
                int count = decompressor.inflate(buffer);
                if (count > 0) {
                    bos.write(buffer, 0, count);
                } else if (count == 0 && decompressor.finished()) {
                    break;
                } else {
                    throw new RuntimeException("Bad zip data, size: " + bytes.length);
                }
            }
        } finally {
            decompressor.end();
        }

        bos.close();
        return bos.toString("UTF-16LE");
    }

    public static byte[] Compress(String text) throws Exception {
        Deflater compressor = new Deflater();
        byte[] bytes = text.getBytes("UTF-16LE");
        compressor.setInput(bytes);

        // Create an expandable byte array to hold the compressed data
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        compressor.finish();

        byte[] buffer = new byte[1024];
        try {
            while (!compressor.finished()) {
                int count = compressor.deflate(buffer);
                bos.write(buffer, 0, count);
            }
        } finally {
            compressor.finish();
        }

        bos.close();
        return bos.toByteArray();
    }
}
